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gisten.. @fitte (ro-ALL wuou Ir MAY eoN'eQsnN: Beit known that I, A. M, CONNETT, of Madison,` in the county of Je`erson, and V:State ofjIndlaua, have. l 4invented a new and luseful Improvement in Braces; and I do hereby declare that the following is-a full, clear,

`iu section in tig. 1, and.n elevation in iig. 2.

-A. CONN-Err; or "MA n-Ifso NQINDIANA.

LetterePatentf No. 80,059, dated July 2 1, 1868.

' die Stretta' retrait tu in tiges-e etttrs stteirt emanating tutt' nt the entre; i

being had tolthe accompanying drawings, forming par't of this specification, i The object. of this inyention is to form the lower bar of a brace so that it may have a. rectangular section, and connect' with theerank ata right angle,^so that cutters orbits may be attached thereon, for the purpose of cutting large circles in wood, leather, rubber, paper, or other similar substances. i

Figure 1 is a side elevation of the brace with the locking-sleeve inseetion.

.-'Ei'gur'Q a side elevation of the bit or cutt'er and the locirilngj'sleeve.Y

Figure 3 is the leather or rubber-cutter. l `l Similar.,lettersofl reference indicate corresponding parts.

.',p-Avis the lower bar of the brace of atr'eetaugular section,- an-dconneeted to the crank by a rightan'gle.

This bar is graduated on one sideV to a scale of one-half to ene,\so that the reading on the bar, which is the and-exact descriptionrthereof, which will enable thoseskilled in the art to make and use the same, reference V radius of the circle, will give the diameter ofthe circle eut.

- B is a locking-sleeve, in which is threaded the oapstau-head set-screw .0, as shown. This sleeveis shown D is a cutter orbit, with a lip turned on its shank, as shown in Iig. 1.-` JThe'uuder side of this lip is bevelled, to'it. a corresponding bevel in the sleeve-B, which is also cut awayon its lower and outer edge,`to bring the bit up ush with the sdesof the saidsleeve.v i V G is an ordinary bit for thefcentre, threaded, for the purpose of feeding down the cutter.

I have adoptedv the c'apstan-headgas the best kind of screw to be Vu'sed'as the set-"screw @although aware that other kinds might be used for that purpose.

, l Operation.

. Whenit is desired to eut a larger circle than an ordinary bit is capable of, the sleeve is slipped ou the bar lA, the lip o n the bit D passed through the s'lefeveunder the bar,` and the .outer side of the sleeve brought tocoincidewith the graduation ou the'bar corresponding withthe diameter ofthe orifice desired to be eut; the screw C is then tightened,l and the bit D drawn up tothe b ar and held rmly.- The bit G vis placed in its socket, and thenstruulent is ready for operation, which is similar to boring with an ordinary bit. Y t

When ,used as an ordinary brace, the sleeve may be Vtaken of. ,Y Y h The bit shown in Eg. 3 is for cutting rubber, leather, and other kindred substances, when making gasketaf'dte, It will readily beiseen that a variety of bits may be used, suited tofdiii'eient work. f

Having thus described my invention, what I claim as new, and desire to secure-by Letters Patent, is-v l The locking-sleeve. B, having the inner face of its underside-bevelled', to receive a bit, l),` in combination with the arm of a bit-stock, constructed `to operate substantially as and for thepurpose herein specified.4

` A. M.'CONNETT.

1v-Yitnesses.: l

HENRY OoNNsrr, Jr., CULvEn W. Kr'ue. 

